Seed germination and growth dynamics of seedlings of tree species under introduction conditions

Abstract

The article presents the results of laboratory and field germination of seeds of woody species. Also, some features of the initial stages of ontogenesis of woody plants in the conditions of mountainous Dagestan are considered. It was found that under the conditions of the Tsudakhar experimental base, a significant predominance of shoot growth is observed in all types of seedlings. Comparative analysis of growth traits in dynamics revealed that different soil and climatic conditions of different altitude gradients have a significant impact on the variability of all considered morphological traits. In all species, the maximum average values of traits were noted under the conditions of the CEB, i.e., these ecological conditions are more conducive to the manifes tation of the genotypic characteristics of the studied species in comparison with the conditions of the BBB. A relationship was found between the dynamics of phenological phases and the degree of winter hardiness: the stronger the annual growth was, the greater the percentage of freezing from the total length of the seedling was observed.